Photographic film.



V. PLANGHON.

PHOTOGRAPHIG FILM. APPLICATION FILED MAY 13, 1907.

1,116,479. Patented Nov. 10, 1914.

' VICTOR PLANCHON, F LYON,

PAPIERS PHOTQGRAPHIQUES. A. LUIVIIE 'rnnncn, ASSIGNOB TO socn rrn 1313sPLAQUES ET in E1 sns FILS, or LYON. FRANCE.

rHo'roeRArHIc riLivi.

, Specification of Letters Patent.

Patented Nov. 10, 1914.

Application and May 13,1907. Serial 1%. 373,437.

To all whom it may concern Be it known that l, Vxcros Pmnonon, a citizenof the Republic of France, residing at Lyon, in France, have invented acertain new and useful Photographic Film, of which the following is aspecification.

This invention comprises a photographic film, which, by itsconstruction, allows the v ordinary construction.

usual bulky paper protecting-band used in roll-films to be dispensedwith, and inwhich there is much lessvhalation than in films of The film,according to this invention, comprises four layers-first, a sensitivegelatin emulsion, secondly, a celluloid support, thirdly, an agglutinantcoating soluble in cold water, and fourthly, a layer of nonactinicinsoluble gelatin permeable to water upon the back of said agglutinantcoating.

Figure l of the accompanying drawings shows a part of the film inperspective, a part of the non-actinic layer being separated from therest of the film; and Fig. 2 is a section of the film.

The celluloid support .72 and the emulsion layer 0 together constitutean ordinary film. The layer a is of soluble gelatin permeable to water,and is impregnated with a nonactinic pigment such as carbon, India ink,or a red dye such as anilin derivatives. Glycerimgum or the like may beadded to increase its permeability.

The layer al is of some agglutinant soluble in cold water such as gumarabic, tra acanth gum, sugar, glucose or the like, an servesv to securethe layers a and 0 together until the developing operation, during whichthe developing solution permeates the layer a, dissolves the layer 0),and thus releases the said layer a.

The complete backed film thus construct ed can be used in rolls, or itmay be used as v cut films or film-packs without the necessity of usingintermediate opaque papers. Moreover halation is more completelyprevented than in ordinary ifilms, as the nonactinic layer is in opticalcontact (through the layer d) with the celluloid support,.

Whereas in the case of the ordinary film there was always an air-spacebetween the celluloid support and the black paper.

What I claim as my invention and desire to secure by Letters Patentis 1. A photographici filin consisting of a pellicular celluloid supporthaving a sensitized coating on its face and an agglutinant coatingsoluble in cold water upon its back, and a pellicular layer ofnon-actinic insoluble gelatin permeable to water upon the back of saidagglutinant coating.

A photographic film consisting of a pellicular celluloid support havinga sensitized coating on its face and a layer of gum soluble in coldwater upon its back, and a pellicular layer of non-actinic insolublegelatin permeable to water upon the back of said layer of gum.

In testimony whereof l have signed my name to this specification in thepresence of two subscribing witnesses.

VICTOR PLANCHON.

Witnesses:

THUS. N. Bnownn, .MARIN VAo oN,

